Equivalent Drawbead and its Application in Optimization of Autobody Forming Process

In this paper, the effect of drawbead on autobody panel forming and the theory of equivalent drawbead are discussed. Compared with the effect of real drawbead, the feasibility and essentiality of equivalent drawbead model in process optimization and finite element analysis of sheet forming are pointed out. An example of car inner door panel is presented. By means of eta/DYNAFORM software, a LS-DYNA based sheet metal forming simulation package, defects of the current process are found, and an optimized process is given.